E-J characteristics in a wide range of electric field for a Bi-2223 silver-sheathed tape wire

The E-J characteristics are measured for a Bi-2223 silver-sheathed tape wir e using the four probe method and a relaxation method of DC magnetization i n the high and low electric field regions, respectively. The obtained resul ts in the two regions are approximately explained by a theoretical analysis based on the flux creep-flow model in which the distribution of flux pinni ng strength is taken into account. It was found that the value of the pinni ng force density and its peak magnetic field are largely different between the two measurements. (C) 2001 Elsevier Science B.V. All rights reserved.